1815087942 has 24 divisors (see below), whose sum is σ = 3938738544. Its totient is φ = 604098864.

The previous prime is 1815087893. The next prime is 1815087961. The reversal of 1815087942 is 2497805181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65458 + ... + 88965.

It is an arithmetic number, because the mean of its divisors is an integer number (164114106).

Almost surely, 2^1815087942 is an apocalyptic number.

1815087942 is an abundant number, since it is smaller than the sum of its proper divisors (2123650602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1815087942 is a wasteful number, since it uses less digits than its factorization.

1815087942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155084 (or 155081 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 1815087942 is about 42603.8489106325. The cubic root of 1815087942 is about 1219.8297581138.

The spelling of 1815087942 in words is "one billion, eight hundred fifteen million, eighty-seven thousand, nine hundred forty-two".